donkeylips
Well-known member
I bought an engine years ago and it sat in a corner until now. The cam gear timing marks are lined up with dowel pins up. The crankshaft notch is pointing at 12 0'clock instead of 2:30. I don't want to take the head off.
So the pistons are all about in the center. If I turn it clockwise pistons #1 and #4 will come up.
With all of the timing marks lined up, cylinder 1 is at TDC. So it is going from its compression stroke to its power stroke. All of the valves should be closed.
Cylinder #4 is going from its exhaust stroke to its intake stroke. Shouldn't all of the valves be closed as the exhaust valves have just closed and the intake valves are about to open?
I would think that it would be safe to rotate the crank clockwise to get pistons #1 and #4 to the top. But when I try to rotate it it stops. It seems as though the only thing that could be stopping it would be that I'm hitting the valves. How to proceed?
So the pistons are all about in the center. If I turn it clockwise pistons #1 and #4 will come up.
With all of the timing marks lined up, cylinder 1 is at TDC. So it is going from its compression stroke to its power stroke. All of the valves should be closed.
Cylinder #4 is going from its exhaust stroke to its intake stroke. Shouldn't all of the valves be closed as the exhaust valves have just closed and the intake valves are about to open?
I would think that it would be safe to rotate the crank clockwise to get pistons #1 and #4 to the top. But when I try to rotate it it stops. It seems as though the only thing that could be stopping it would be that I'm hitting the valves. How to proceed?